L64105 LSI Logic Corporation, L64105 Datasheet - Page 211

• Manufacturer Part Number: L64105
• Description: Mpeg-2 Audio/video Decoder
• Manufacturer: LSI Logic Corporation

Figure 6.7
Private
Data
PES
128
10
2
DTS
PTS
33
33
Scrambling
Control
Header
PES
Pack
Field
2
8
PES Packet Structure
ESCR
42
Program
Priority
Seq Ctr
Packet Start Code is a string of 23 zeros followed by a logic one. The
next byte, the Stream ID, identifies the type of data that is in the packet.
The Packet Length field specifies the number of bytes following to the
end of the packet. The Preparser stores the remainder of the packet
header, the PES header, in a buffer in SDRAM with padding to make it
a multiple of 8 bytes. The write pointer to the beginning of that buffer area
is padded out to 8 bytes and stored in the same buffer following the PES
header.
Preparser
Packet
PES
1
8
Rate
ES
22
Alignment
Indicator
Packet
Prefix
P-STD
Code
Buffer
Start
Data
24
16
1
Mode
DSM
Trick
8
Copyright
Extension
Stream
Length
Field
PES
ID
8
1
7
Additional
Copy
Info
7
Extension
Original
Length
Packet
PES
Copy
Field
Data
PES
16
or
1
Previous
CRC
PES
16
Additional Padding
Bytes to Fill 8 Byte
Optional
Header
7 Flags
PES
8
5 Flags
Word
8
Added by L64105 when PES
Header is stored in SDRAM
Header
Length
PES
8
Optional
Fields
Padding
Optional
44
Fields
Channel
Pointer
Write
20
Bytes
0xFF
Stuff
1
6-15